Unit 3 Test: Atoms and the Periodic Table

_________ have a positive charge. 

_________ have a negative charge. 

________ have no charge (neutral). 

The ______ ______ is equal to the number of protons in the nucleus.

_____ are the smallest piece of an element that still represent that element.

Neon has an atomic mass of _____

Lead (Pb) has an atomic mass of _____

Iron (Fe) has an atomic number of __.

Lithium (Li) has an atomic number of _.

Cerium (Ce) has an atomic number of __.